Asteroids

477162 2009ES help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.963

Aphelion (Q)

1.909

Eccentricity (e)

0.329

Inclination (i)

30.3

deg

Orbit period (P)

628.7

Earth MOID

0.04018

U parameter

1.1

Next Earth close approach

Date

2047-09-01

Nominal distance (from Earth center)

0.10067

15059718

Maximum Brightness

17.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

20.6

mag

Diameter

210 - 500*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2009-03-02

Observatory

Mt. Lemmon Survey

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.436291

1-sigma variation

4.020E-8

Unit

Eccentricity (e)

Value

0.329245

1-sigma variation

4.525E-8

Unit

Inclination (i)

Value

30.3317

1-sigma variation

2.020E-5

Unit

Long. of Ascending Node (Ω)

Value

343.7016

1-sigma variation

3.948E-6

Unit

Arg. of Perihelion (ω)

Value

311.1940

1-sigma variation

6.346E-6

Unit

Mean Anomaly (M)

Value

149.68342

1-sigma variation

0.00007

Unit

Perihelion distance

Value

0.963399

1-sigma variation

Unit

Aphelion distance

Value

1.909183

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.043754

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.642566

1-sigma variation

Unit

MOID

Value

0.040179

1-sigma variation

Unit

Orbit Period

Value

628.7270

1-sigma variation

Unit

U parameter

Value

1.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.61617E-15	-1.66503E-15	4.45009E-14	-6.02318E-15	2.93787E-14	-2.63295E-12
e	-1.66503E-15	2.04737E-15	-7.12699E-14	-4.09185E-14	7.52164E-14	2.62743E-12
i	4.45009E-14	-7.12699E-14	4.08109E-10	4.09706E-11	-3.59980E-11	-8.16940E-11
Ω	-6.02318E-15	-4.09185E-14	4.09706E-11	1.55871E-11	-2.13504E-11	1.30534E-11
ω	2.93787E-14	7.52164E-14	-3.59980E-11	-2.13504E-11	4.02689E-11	-7.15936E-11
M	-2.63295E-12	2.62743E-12	-8.16940E-11	1.30534E-11	-7.15936E-11	4.32661E-9

Date of computation: 2025-09-10 00:30 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

Unit

Source

[1]

[2]

Quality

Value

Unit

Source

[1]

[2]

Amplitude

Value

0.33

Unit

mag

Source

[1]

[2]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

20.56

Unit

mag

Source

[3]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[3]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[4]

Diameter

Value

210 - 500*

Unit

Source

[4]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[5]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Warner, B.D. (2017) Minor Planet Bul. 44, 22-36.
[2]	EARN	1.) Warner, B.D. (2017) MPB 44, 22-36. (NEAR-EARTH ASTEROID LIGHTCURVE ANALYSIS AT CS3-PALMER DIVIDE STATION: 2016 JULY-SEPTEMBER) (46 NEAs)
[3]	ESA Aegis	ESA orbit determination and impact monitoring system
[4]	Estimation	Estimated from absolute magnitude
[5]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

4368

Unit

Source

[1]

Unobserved

Value

1716

Unit

Source

[1]

Normalized RMS of residuals

Value

0.513538

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2009-03-02.21182

Unit

Source

[2]

Last Observation

Value

2021-02-15.418376

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

173 (1)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2016-09-10

Unit

Source

[3]

Last Observation

Value

2016-09-11

Unit

Source

[3]

Delay (Discarded)

Value

1 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

2 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close Approaches for 477162 2009ES from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1961-09-05 12:47	< 1 min	0.0431047	0.0430990	0.0000019
EARTH	2004-08-28 22:18	< 1 min	0.1593377	0.1593340	0.0000013
EARTH	2016-09-05 19:24	< 1 s	0.0483771	0.0483771	0.0000000
MARS	2017-10-18 17:28	< 1 s	0.0045742	0.0045735	0.0000002
EARTH	2047-09-01 10:41	< 1 min	0.1006680	0.1006475	0.0000068
EARTH	2059-09-13 02:17	< 1 min	0.1867215	0.1866950	0.0000088
EARTH	2090-09-05 20:04	< 1 min	0.0434913	0.0434808	0.0000035
MARS	2098-09-04 04:16	< 1 min	0.0403907	0.0403544	0.0000121
EARTH	2121-09-02 19:02	1.9	0.0853743	0.0852904	0.0000279

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
34.37796924	240.73605763	0.04111027	MINIMUM
284.03059593	92.59033145	0.46976910	MINIMUM
325.27295215	143.50917080	0.53659796	SADDLE
160.79284856	2.50630143	1.09599514	SADDLE
349.78972568	1.88304632	1.90120086	SADDLE
187.43843301	201.91238861	2.87853414	MAXIMUM

Download:

MOID Plots

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